Method gen_groups

src/debug_utils/generic_reginfo/arbitrary.rs:262–291

Creates register groups from the given registers.

(&mut self, group_size: usize, members: &[PhysReg])

    /// Creates register groups from the given registers.
    fn gen_groups(&mut self, group_size: usize, members: &[PhysReg]) -> Result<Vec<RegGroup>> {
        // Start with all members at every group index.
        let mut all = vec![members.to_vec(); group_size];

        // Fix up lists to ensure that the same register is not used multiple
        // times in a group.
        let mut temp = vec![];
        for group_idx in 1..group_size {
            for idx in 0..members.len() {
                while (0..group_idx)
                    .map(|i| all[i][idx])
                    .any(|r| r == all[group_idx][idx])
                {
                    temp.push(all[group_idx].swap_remove(idx));
                }
                all[group_idx].append(&mut temp);
            }
        }

        // Create the register groups
        let mut out = vec![];
        #[allow(clippy::needless_range_loop)]
        for i in 0..all.len() {
            let regs = (0..group_size).map(|group_idx| all[group_idx][i]).collect();
            let group = self.reginfo.groups.push(RegGroupData { regs });
            out.push(group);
        }

        Ok(out)
    }

    /// Creates a new register in a bank, making sure it doesn't share a unit
    /// with an existing register in the bank.